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Effect of molecular structure of aniline–formaldehyde copolymers on corrosion inhibition of mild steel in hydrochloric acid solution

Effect of molecular structure of aniline–formaldehyde copolymers on corrosion inhibition of mild steel in hydrochloric acid solution
Effect of molecular structure of aniline–formaldehyde copolymers on corrosion inhibition of mild steel in hydrochloric acid solution
Aniline–formaldehyde copolymers with different molecular structures have been prepared and investigated for the purpose of corrosion control of mild steel in hydrochloric acid. The copolymers were synthesized by a condensation polymerization process with different ratios of aniline to formaldehyde in acidic precursor solutions. The corrosion inhibition efficiency of as-synthesized copolymers for Q235 mild steel was investigated in 1.0 mol L?1 hydrochloric acid solution by weight loss measurement, potentiodynamic polarization, and electrochemical impedance spectroscopy, respectively. All the results demonstrate that as-prepared aniline–formaldehyde copolymers are efficient mixed-type corrosion inhibitors for mild steels in hydrochloric acid. The corrosion inhibition mechanism is discussed in terms of the role of molecular structure on adsorption of the copolymers onto the steel surface in acid solution.
aniline-formaldehyde copolymer, anticorrosion, inhibitor, mild steel, molecular structure
0304-3894
130-139
Zhang, Yan
8552a39d-0c4d-4712-8ad8-d0d5cc9d1779
Nie, Mengyan
a8613738-d74a-40fb-8881-08069fb0a34b
Wang, Xiutong
fa4b865a-ec25-4e89-9c94-c1a18f98a220
Zhu, Yukun
14ede979-26b0-4e57-ab78-abe440874662
Shi, Fuhua
f37cf03d-ea98-4278-9948-9e8b80cb3da0
Yu, Jianqiang
c76221b2-ddd6-4ef9-a00c-f3df244d5be1
Hou, Baorong
bdb3059f-4e7d-4f27-87ec-34634e570de2
Zhang, Yan
8552a39d-0c4d-4712-8ad8-d0d5cc9d1779
Nie, Mengyan
a8613738-d74a-40fb-8881-08069fb0a34b
Wang, Xiutong
fa4b865a-ec25-4e89-9c94-c1a18f98a220
Zhu, Yukun
14ede979-26b0-4e57-ab78-abe440874662
Shi, Fuhua
f37cf03d-ea98-4278-9948-9e8b80cb3da0
Yu, Jianqiang
c76221b2-ddd6-4ef9-a00c-f3df244d5be1
Hou, Baorong
bdb3059f-4e7d-4f27-87ec-34634e570de2

Zhang, Yan, Nie, Mengyan, Wang, Xiutong, Zhu, Yukun, Shi, Fuhua, Yu, Jianqiang and Hou, Baorong (2015) Effect of molecular structure of aniline–formaldehyde copolymers on corrosion inhibition of mild steel in hydrochloric acid solution. Journal of Hazardous Materials, 289, 130-139. (doi:10.1016/j.jhazmat.2015.02.036).

Record type: Article

Abstract

Aniline–formaldehyde copolymers with different molecular structures have been prepared and investigated for the purpose of corrosion control of mild steel in hydrochloric acid. The copolymers were synthesized by a condensation polymerization process with different ratios of aniline to formaldehyde in acidic precursor solutions. The corrosion inhibition efficiency of as-synthesized copolymers for Q235 mild steel was investigated in 1.0 mol L?1 hydrochloric acid solution by weight loss measurement, potentiodynamic polarization, and electrochemical impedance spectroscopy, respectively. All the results demonstrate that as-prepared aniline–formaldehyde copolymers are efficient mixed-type corrosion inhibitors for mild steels in hydrochloric acid. The corrosion inhibition mechanism is discussed in terms of the role of molecular structure on adsorption of the copolymers onto the steel surface in acid solution.

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More information

Accepted/In Press date: 13 February 2015
e-pub ahead of print date: 16 February 2015
Published date: May 2015
Keywords: aniline-formaldehyde copolymer, anticorrosion, inhibitor, mild steel, molecular structure
Organisations: nCATS Group

Identifiers

Local EPrints ID: 374837
URI: http://eprints.soton.ac.uk/id/eprint/374837
ISSN: 0304-3894
PURE UUID: cf180272-d1ce-4836-93f7-52f8ad871812
ORCID for Mengyan Nie: ORCID iD orcid.org/0000-0002-7758-760X

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Date deposited: 03 Mar 2015 14:27
Last modified: 14 Mar 2024 19:15

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Contributors

Author: Yan Zhang
Author: Mengyan Nie ORCID iD
Author: Xiutong Wang
Author: Yukun Zhu
Author: Fuhua Shi
Author: Jianqiang Yu
Author: Baorong Hou

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